AD5421 Analog Devices, AD5421 Datasheet - Page 13

• Manufacturer Part Number: AD5421
• Description: 16-Bit, Serial Input, Loop-Powered, 4mA to 20mA DAC
• Manufacturer: Analog Devices

Specifications of AD5421

• Resolution (bits): 16bit
• Dac Settling Time: 50µs
• Max Pos Supply (v): +52V
• Single-supply: Yes
• Dac Type: Current Out
• Dac Input Format: SPI

Data Sheet
TYPICAL PERFORMANCE CHARACTERISTICS
–0.01
–0.02
–0.03
–0.04
–0.05
–0.06
–0.2
–0.4
–0.6
–0.8
–1.0
–0.2
–0.4
–0.6
–0.8
–1.0
0.01
1.0
0.8
0.6
0.4
0.2
1.0
0.8
0.6
0.4
0.2
0
0
0
0
0
0
V
EXT NMOS
R
T
4mA TO 20mA RANGE
EXT V
EXT R
V
EXT NMOS
R
T
4mA TO 20mA RANGE
EXT V
EXT R
A
A
LOOP
LOAD
LOOP
LOAD
Figure 7. Differential Nonlinearity Error vs. Code
= 25°C
= 25°C
Figure 6. Integral Nonlinearity Error vs. Code
Figure 8. Total Unadjusted Error vs. Code
REF
REF
SET
SET
V
V
V
V
V
V
10k
10k
= 24V
= 250Ω
= 24V
= 250Ω
10k
REF
REF
REF
REF
REF
REF
EXT, R
EXT, R
EXT, R
INT, R
INT, R
INT, R
20k
20k
20k
SET
SET
SET
SET
SET
SET
INT, NMOS EXT, 24V
INT, NMOS INT, 24V
INT, NMOS INT, 52V
EXT, NMOS EXT, 24V
EXT, NMOS INT, 24V
EXT, NMOS INT, 52V
DAC CODE
DAC CODE
DAC CODE
30k
30k
30k
40k
40k
40k
R
T
4mA TO 20mA RANGE
A
LOAD
= 25°C
50k
50k
50k
= 250Ω
60k
60k
60k
Rev. C | Page 13 of 36
–0.0002
–0.0004
–0.0006
–0.0008
–0.005
–0.010
0.015
0.010
0.005
–0.01
–0.02
–0.03
–0.04
–0.05
–0.06
0.0012
0.0010
0.0008
0.0006
0.0004
0.0002
0.03
0.02
0.01
0
0
–40
–40
0
Figure 11. Integral Nonlinearity Error vs. Temperature
–40
V
4mA TO 20mA RANGE
R
EXT NMOS
V
4mA TO 20mA RANGE
R
EXT NMOS
V
4mA TO 20mA RANGE
R
LOOP
LOAD
LOOP
LOAD
LOOP
LOAD
EXT V
EXT V
INT V
INT V
= 24V
Figure 9. Offset Error vs. Temperature
= 24V
Figure 10. Gain Error vs. Temperature
= 250Ω
= 250Ω
–15
–15
= 24V
= 250Ω
–15
REF
REF
REF
REF
, INT R
, EXT R
, INT R
, EXT R
10
10
TEMPERATURE (°C)
TEMPERATURE (°C)
10
TEMPERATURE (°C)
SET
SET
SET
SET
MAX INL
MIN INL
35
35
35
EXT V
EXT V
INT V
INT V
60
60
EXT V
EXT V
INT V
INT V
60
REF
REF
REF
REF
REF
REF
REF
REF
, INT R
, EXT R
, INT R
, EXT R
, INT R
, EXT R
, INT R
, EXT R
85
85
85
AD5421
SET
SET
SET
SET
SET
SET
SET
SET